Yarramundi is a suburb of Sydney, in the state of New South Wales, Australia. Yarramundi is located 69 kilometres west of the Sydney central business district, in the local government area of the City of Hawkesbury.

The suburb is named after Yarramundi, an Indigenous Australian of the Boorooberongal clan of the Darug people. He was a garadyi or 'doctor' and was called by Europeans 'the chief of the Richmond Tribe'.